Here we have a hardware upgrade that significantly modifies the capabilities of an open-source robotic 3D printer. Which is designed to be printed on that printer. And is uploaded to a social-software site for sharing fabricatable designs, forking them, and resubmitting improvements.

Let’s say that again: this is a downloadable hardware upgrade for an affordable robot that can fabricate its own components.Which I am linking to, because it’s been shared on a kind of Flickr for fabricatable objects.